Veto q&a 7 Month22 (1)

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@scientech
The founder of electro magnetic wave theory
A. Marxwell
Ac to Dc --- rectifier
DC to AC --- Oscillator
Semi conductor in pure state is called
A. Intrinsic semi conductors
In Intrinsic, the number of holes is equal to the
number of
A. Electrons
The ‘Resistivity’ is the opposite of
A. conductivity
Substance which does not allow the flow of current
through them is called
A. Insulator
Super conductivity was discovered by
A. Dutch Physicist Kamerlingh Onnes
Electricity produced through water is called
A. Hydro Power
National energy conservation day
A. December 14
Electrical Oscillation was invented by
A. Henrich Hertz
Who invented “Induction Motor”
A. Nicholas Tesla
The device used to measure Electric current
A. Ammeter
Q & A Maestro
Michael Faradey
• Father of electricity
• Law of electrolysis was
formulated
• The concept of an electric
field was introduced
• ‘Dynamo’ was invented
• electro Magnetic Induction was discovered
• ‘Benzene’ was invented
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Which are the metals used in an ordinary fuse wire
A. Alloy of Tin and Lead (Solder)
Colour of positive wire in domestic circuits
A. Red/Brown
Colour of neutral wire in domestic circuits
A. Black/Blue
Quartz crystal in watches work on the Principle of
A. Peizo electricity
The number of cells connected together are called
A. Battery
Electricity supplied for domestic use is
A. Alternating Current (AC)
• It is the continuous flow of current
Electricity for domestic purpose is measured in
A. kilowatt hour (kwh)
The commercial unit of electrical energy
A. kwh
Galvanic current is the other name of
A. DC (Direct Current)
The best conductor of electricity is
A. silver
Electric current transmission was developed by
A. Edison
The supply voltage produced in India
A. 11 Kv
Voltage range for house hold purpose
A. 220-230 Volt
The frequency of household electric current in India
A. 50 Hertz
Which are the metals commonly used in electrical circuits
A. Copper and Aluminium
The emf of a Voltaic Cell
A. 1 Volt
Voltage of a torch cell
A. 1.5 Volt
Permanent magnet is made up of
A. Alnico
kAS
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